Water-based polymers for use as friction reducers in aqueous treatment fluids

Abstract

Provided are methods comprising providing an aqueous polymer dispersion comprising water, an anionic salt, a water-based friction reducing polymer, a polyol, an anionic surfactant, and a nonionic surfactant; mixing the aqueous polymer dispersion with additional water to form an aqueous treatment fluid; and introducing the aqueous treatment fluid into a subterranean formation. Also provided are methods comprising providing an aqueous treatment fluid comprising water, an anionic salt, a water-based friction reducing polymer in an amount sufficient to provide friction reduction without forming a gel, a polyol, an anionic surfactant, and a nonionic surfactant; and introducing the aqueous treatment fluid into a subterranean formation.

1. An aqueous subterranean treatment fluid comprising:
 water; 
 an anionic salt; 
 an anionic water-based friction reducing polymer in an amount sufficient to provide friction reduction without forming a gel, wherein the anionic water-based friction reducing polymer is a copolymer comprising acrylamide and acrylic acid; 
 glycerin; 
 polyester polyol; and 
 an ammonium salt of polyacrylic acid. 
 
     
     
       2. The aqueous subterranean treatment fluid of  claim 1  wherein the water is selected from the group consisting of freshwater, saltwater, brine, seawater, and combinations thereof. 
     
     
       3. The aqueous subterranean treatment fluid of  claim 1  wherein the acrylamide is partially hydrolyzed to form the acrylic acid. 
     
     
       4. The aqueous subterranean treatment fluid of  claim 1  wherein the acrylamide is present in the friction reducing polymer in an amount in the range of from about 60% to about 90% by weight of the friction reducing polymer, and the acrylic acid is present in the friction reducing polymer in an amount in the range of from about 10% to about 30% by weight of the friction reducing polymer. 
     
     
       5. The aqueous subterranean treatment fluid of  claim 1  wherein the copolymer further comprises and at least one monomer selected from the following group: 2-acrylamido-2-methylpropane sulfonic acid, N,N-dimethylacrylamide, vinyl sulfonic acid, N-vinyl acetamide, N-vinyl formamide, itaconic acid, methacrylic acid, diallyl dimethyl ammonium chloride, and combinations thereof. 
     
     
       6. The aqueous subterranean treatment fluid of  claim 1  wherein the anionic water-based friction reducing polymer is present in the aqueous treatment fluid in an amount in the range of from about 0.01% to about 1% by weight of the aqueous subterranean treatment fluid. 
     
     
       7. The aqueous subterranean treatment fluid of  claim 1  wherein the anionic water-based friction reducing polymer is present in the aqueous treatment fluid in an amount in the range of from about 0.025% to about 0.1% by weight of the aqueous subterranean treatment fluid. 
     
     
       8. The aqueous subterranean treatment fluid of  claim 1  wherein the aqueous subterranean treatment fluid has a viscosity in the range of from about 0.7 centipoise to about 30 centipoise. 
     
     
       9. The aqueous subterranean treatment fluid of  claim 1  wherein the aqueous subterranean treatment fluid comprises proppant particulates. 
     
     
       10. The aqueous subterranean treatment fluid of  claim 1 , wherein the aqueous subterranean treatment fluid has a viscosity in the range of from about 1 centipoise to about 25 centipoise. 
     
     
       11. The aqueous subterranean treatment fluid of  claim 1  wherein the anionic water-based friction reducing polymer has a molecular weight in the range of from about 7,500,000 to about 20,000,000. 
     
     
       12. An aqueous subterranean treatment fluid comprising:
 water, an anionic salt, an anionic water-based friction reducing polymer comprising acrylamide and acrylic acid, glycerin, polyester polyol, and an ammonium salt of polyacrylic acid, wherein the aqueous subterranean treatment fluid has a viscosity in the range of from about 0.7 centipoise to about 30 centipoise. 
 
     
     
       13. The aqueous subterranean treatment fluid of  claim 12  wherein the anionic water-based friction reducing polymer is present in an amount in the range of from about 0.01% to about 1% by weight of the aqueous subterranean treatment fluid. 
     
     
       14. The aqueous subterranean treatment fluid of  claim 12  wherein the anionic water-based friction reducing polymer is present in the aqueous treatment fluid in an amount in the range of from about 0.025% to about 0.1% by weight of the aqueous subterranean treatment fluid. 
     
     
       15. The aqueous subterranean treatment fluid of  claim 12  wherein the aqueous subterranean treatment fluid comprises proppant particulates. 
     
     
       16. The aqueous subterranean treatment fluid of  claim 12  wherein the anionic water-based friction reducing polymer has a molecular weight in the range of from about 7,500,000 to about 20,000,000. 
     
     
       17. The aqueous subterranean treatment fluid of  claim 12  wherein the acrylamide is partially hydrolyzed to form the acrylic acid. 
     
     
       18. An aqueous subterranean treatment fluid prepared by mixing an aqueous polymer dispersion, the aqueous polymer dispersion comprising water, an anionic salt, an anionic water-based friction reducing polymer comprising acrylamide and acrylic acid, glycerin, polyester polyol, and an ammonium salt of polyacrylic acid, with additional water, wherein the anionic water-based friction reducing polymer is present in the aqueous subterranean treatment fluid in an amount sufficient to provide friction reduction without forming a gel. 
     
     
       19. The aqueous subterranean treatment fluid of  claim 18  wherein the anionic water-based friction reducing polymer is present in the aqueous polymer dispersion in an amount in the range of from about 5% to about 30% by weight of the dispersion. 
     
     
       20. The aqueous subterranean treatment fluid of  claim 18  wherein the anionic water-based friction reducing polymer is present in the aqueous subterranean treatment fluid in an amount in the range of from about 0.025% to about 0.1% by weight of the aqueous subterranean treatment fluid.